Propagation
Division of the rhizome, including a growing tip during spring.

Botanic information
Leaf: The large dark green oblong leaves have a leathery texture with an acute apex and the petiole is up to 2m (6ft) long.

Flower: The small tubulate flowers appear in a cluster during spring but are not commonly seen.

Fruit: The capsule contains tiny seeds but are not commonly used and the plant is normally reproduced vegetatively. 

Note:
All plants in this genus require abundant moisture during the growing season and rich humus rich soil. They tolerate some cooler weather but prefer a hot humid environment.

It the soil becomes frozen the plant dies off but if it is not too severe the rhizome will re-shoot. The flowers only appear on 2-year old growth and under cold conditions it may never flower. 
If grown in containers use a peat base sandy mix and use a balanced liquid fertiliser during the growing period and reduce watering during winter.